QUOTE(Storini @ Feb 23 2006, 10:53 AM)

Just to be a bit technical, I think the tuning problems are more to do with changes in relative humidity rather than changes in temperature, but the latter in practice causes the former. I think there hasn't been a lot of rain this winter, and with it being cold as well, the result is that a RH level of ~30% has not been uncommon indoors. This is quite dry, and will cause wood instruments of any kind to shrink, with the result that tuning will go off. String players will know this very well; a RH of 40-50% is ideal IMO.
In some parts of North America, the seasonal changes in RH are so large that they can cause structural problems in pianos due to the regular expansion and contraction of the outer materials relative to the more stable inner parts. So, don't grumble too much!
I agree with this.
I had my GB1 tuned three weeks ago (2nd tune since buying it new in July last year) The tuner said it would need doing again in May or June.
I've noticed how very dry this winter has been, as I live in a converted barn with solid wooden interior doors and I'm amazed at the shrinkage on these, so goodness only knows what's going on inside the piano.